Add spin session functionality and update game mechanics

- Introduced a new `spin_sessions` table to track user spin activities.
- Updated the API to include a new endpoint for spinning games, allowing users to place bets and specify spin counts.
- Enhanced game information structure and added validation for bets and spin counts.
- Implemented the `Forest Fortune` slot game mechanics, including payline evaluation and scatter functionality.
- Updated dependencies in `pyproject.toml` for development and added `httpx` for HTTP requests.
- Added unit tests for the new slot mechanics and API endpoints to ensure functionality and reliability.

alembic/versions/0002_spin_sessions.py

@@ -0,0 +1,40 @@
+"""Add spin_sessions table."""
+
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "0002_spin_sessions"
+down_revision: Union[str, None] = "0001_initial"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "spin_sessions",
+        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column("user_id", sa.Integer(), nullable=False),
+        sa.Column("slug", sa.String(length=64), nullable=False),
+        sa.Column("bet", sa.Numeric(18, 2), nullable=False),
+        sa.Column("spin_count", sa.Integer(), nullable=False),
+        sa.Column("total_win", sa.Numeric(18, 2), nullable=False),
+        sa.Column("payload_json", sa.Text(), nullable=False),
+        sa.Column(
+            "created_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.text("CURRENT_TIMESTAMP"),
+            nullable=False,
+        ),
+        sa.ForeignKeyConstraint(["user_id"], ["users.id"], ondelete="CASCADE"),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index("ix_spin_sessions_user_id", "spin_sessions", ["user_id"], unique=False)
+    op.create_index("ix_spin_sessions_slug", "spin_sessions", ["slug"], unique=False)
+
+
+def downgrade() -> None:
+    op.drop_index("ix_spin_sessions_slug", table_name="spin_sessions")
+    op.drop_index("ix_spin_sessions_user_id", table_name="spin_sessions")
+    op.drop_table("spin_sessions")